1
|
Abd-AlGhafar WN, Aly FA, Sheribah ZA, Saad S. Green, Validated HPLC Method Coupled With Fluorescence Detection for the Analysis of Tafluprost in its Pure Form and Ophthalmic Formulation: Application to Aqueous Humor and Content Uniformity Testing. J Chromatogr Sci 2023; 61:151-159. [PMID: 35834929 DOI: 10.1093/chromsci/bmac061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Revised: 03/31/2022] [Accepted: 07/01/2022] [Indexed: 11/13/2022]
Abstract
A green, simple and sensitive HPLC method coupled with fluorescence detection was implemented for the quantitative determination of the anti-glaucoma drug tafluprost (TFL). Liquid chromatography was performed on HyperClone™ ODS (C18) column of dimensions; 150 × 4.6 mm i.d. and 5 μm particle size using a green eluent; ethanol:0.01 M phosphate buffer (60:40 v/v, pH 4.5) delivered at 1 mL min-1. Fluorescence detection was accomplished at 220 nm (excitation) and 292 nm (emission). Bimatoprost (BIM) was used as an internal standard (I.S.). In this method, TFL was eluted after 6.70 minutes. The method satisfied International Council for Harmonization (ICH) validation guidelines, as proved by good linearity (r = 0.9999, over the range 0.05-2 μg mL-1), accuracy (recovery average 100.13 ± 1.27%), precision, robustness and specificity. The limit of detection and limit of quantification were found to be 0.016 and 0.048 μg mL-1, respectively. The proposed method has been successfully applied for the estimation of TFL in eye drops and aqueous humor. For the first time, the approach was applied with acceptable results for the evaluation of the uniformity of TFL eye drops content. Furthermore, Green Analytical Procedure Index (GAPI) and analytical Eco-scale were used to prove that the proposed HPLC method is environmentally friendly.
Collapse
Affiliation(s)
- Walaa Nabil Abd-AlGhafar
- Mansoura University, Faculty of Pharmacy, Pharmaceutical Analytical Chemistry Department, Mansoura 35516, Egypt
| | - Fatma Ahmed Aly
- Mansoura University, Faculty of Pharmacy, Pharmaceutical Analytical Chemistry Department, Mansoura 35516, Egypt
| | - Zeinab Awad Sheribah
- Mansoura University, Faculty of Pharmacy, Pharmaceutical Analytical Chemistry Department, Mansoura 35516, Egypt
| | - Samar Saad
- Mansoura University, Faculty of Pharmacy, Pharmaceutical Analytical Chemistry Department, Mansoura 35516, Egypt
| |
Collapse
|
2
|
Jang M, Kang KE, Cho BJ. Effect of Prostaglandin Analogues on Central Corneal Thickness: 3-Year Follow-up Results. KOREAN JOURNAL OF OPHTHALMOLOGY 2020; 34:347-352. [PMID: 33099555 PMCID: PMC7597608 DOI: 10.3341/kjo.2019.0129] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2019] [Accepted: 05/07/2020] [Indexed: 11/23/2022] Open
Abstract
PURPOSE To evaluate the effects of each subgroup of prostaglandin analogues (PGAs) on central corneal thickness (CCT) in patients with normal tension glaucoma (NTG). METHODS We retrospectively reviewed 55 eyes of 55 patients with NTG who were receiving PGA therapy. Patients who were treated with 0.005% latanoprost (16 eyes), 0.0015% tafluprost (16 eyes), or 0.004% travoprost (23 eyes) monotherapy were included. CCT assessments were performed at baseline and 1, 2, and 3 years after initiation of treatment. RESULTS In the NTG group, the mean CCT showed a decreasing trend, and there was a significant difference in mean CCT at 1, 2, and 3 years compared with baseline (baseline, 538.16 ± 32.14; 1 year, 526.55 ± 37.30 µm [p = 0.00]; 2 years, 521.67 ± 36.79 µm [p = 0.00]; 3 years, 520.43 ± 36.88 µm [p = 0.00]). The reduction of CCT was confirmed by subgroup analysis. In the 0.005% latanoprost group, mean CCT was decreased at 1 year (p = 0.11), 2 years (p = 0.00), and 3 years (p = 0.02). In the 0.0015% tafluprost group and the 0.004% travoprost group, mean CCT was also significantly decreased at all years (p = 0.00). No statistical difference was observed between the NTG subgroups (p = 0.06). CONCLUSIONS Topical therapy with PGAs appeared to cause a significant decrease in CCT reduction in patients with NTG. A long-term follow-up study including more participants is needed.
Collapse
Affiliation(s)
- Minsu Jang
- Department of Ophthalmology, Konkuk University Medical Center, Konkuk University School of Medicine, Seoul, Korea
| | - Kyung Eun Kang
- Department of Ophthalmology, Konkuk University Medical Center, Konkuk University School of Medicine, Seoul, Korea
| | - Byung Joo Cho
- Department of Ophthalmology, Konkuk University Medical Center, Konkuk University School of Medicine, Seoul, Korea
| |
Collapse
|
3
|
Abd-AlGhafar WN, Saad S, Sheribah Z, Aly F. Green highly sensitive spectrofluorimetric method for rapid determination of tafluprost in its pure form and ophthalmic formulation. LUMINESCENCE 2020; 35:1264-1268. [PMID: 32519438 DOI: 10.1002/bio.3887] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2020] [Revised: 05/14/2020] [Accepted: 05/20/2020] [Indexed: 11/08/2022]
Abstract
A green, simple and easy spectrofluorimetric method was studied for rapid estimation of tafluprost (TFL). The native fluorescence of TFL was measured at 292 nm after excitation at 220 nm. The results were linear in water over the concentration range 50-600 ng ml-1 with a correlation coefficient r = 0.9999 and intercept 1.1555. The limit of detection and limit of quantification were found to be 7.87 and 23.86 ng ml-1 , respectively. Neither different pH nor surfactants enhanced the fluorescence intensity. The high sensitivity of this spectrofluorimetric method makes it suitable for analysis of low concentrations of tafluprost in commercially available ophthalmic formulations. This procedure was validated according to International Council for Harmonisation Guidelines.
Collapse
Affiliation(s)
- Walaa Nabil Abd-AlGhafar
- Faculty of Pharmacy, Pharmaceutical Analytical Chemistry Department, Mansoura University, Mansoura, Egypt
| | - Samar Saad
- Faculty of Pharmacy, Pharmaceutical Analytical Chemistry Department, Mansoura University, Mansoura, Egypt
| | - Zainab Sheribah
- Faculty of Pharmacy, Pharmaceutical Analytical Chemistry Department, Mansoura University, Mansoura, Egypt
| | - Fatma Aly
- Faculty of Pharmacy, Pharmaceutical Analytical Chemistry Department, Mansoura University, Mansoura, Egypt
| |
Collapse
|
4
|
Shin JA, Kim NW, Kang SS, Kim ML, Sung KR. In vitro Effects of Prostaglandin Analogs on Cultured Astrocytes Obtained from the Lamina Cribrosa. Curr Eye Res 2015; 41:676-82. [PMID: 26237412 DOI: 10.3109/02713683.2015.1050741] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
PURPOSE To evaluate the effects of prostaglandin analogs (PGAs) on cell viability and apoptosis in cultured astrocytes obtained from the lamina cribrosa (LC) of the human optic nerve head (ONH). METHODS Astrocytes were cultured from LC samples obtained from human donor ONH and treated with three kinds of acid form of PGAs: latanoprost (LAT-A), tafluprost (TAF-A), and bimatoprost (BIM-A) (0.1, 1, 10, 50 and 100 ug/mL). Cell viability was assessed using the WST-1 assay. Cell apoptosis was measured using the deoxynucleotidyl transferase (TdT)-mediated dUTP nick end-labeling (TUNEL) assay. Apoptotic protein expression was evaluated using western blot analysis. RESULTS ONH astrocytes expressed FP receptor in western blot analysis. In the presence of 0.1 ug/mL of LAT-A, BIM-A, and TAF-A, the cell viability was 85%, 85% and 82%, respectively. WST-1 assay revealed about 50% of cell viability following treatment with 50 ug/mL of all PGAs. After exposing astrocytes to 10 ug/mL of each PGA for 24 hours, apoptotic cells were stained in TUNEL assay. Western blot analysis revealed that the PGAs up-regulated Bax (pro-apoptotic protein) and down-regulated Bcl-xL (anti-apoptotic protein) in the astrocytes. CONCLUSIONS PGAs affected cell viability in cultured astrocytes obtained from human ONH LC. PGA treatment may induce apoptosis in ONH astrocytes.
Collapse
Affiliation(s)
- Jin A Shin
- a Biomedical Research Center , Seoul , Korea
| | - Nam Woo Kim
- b College of Medicine, University of Ulsan , Seoul , Korea and
| | | | | | - Kyung Rim Sung
- c Department of Ophthalmology , College of Medicine, Asan Medical Center, University of Ulsan , Seoul , Korea
| |
Collapse
|
5
|
Chang C, Zhang AQ, Kagan DB, Liu H, Hutnik CML. Mechanisms of benzalkonium chloride toxicity in a human trabecular meshwork cell line and the protective role of preservative-free tafluprost. Clin Exp Ophthalmol 2014; 43:164-72. [PMID: 25041649 DOI: 10.1111/ceo.12390] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2014] [Accepted: 07/06/2014] [Indexed: 12/01/2022]
Abstract
BACKGROUND Benzalkonium chloride (BAK) is a controversial ophthalmic preservative because of its prominent side-effect profile. In this study, we examined the mechanism of BAK toxicity in human trabecular meshwork cells (HTMC) and compared the effects of BAK with tafluprost free acid, which is an active form of tafluprost commercially available in a preservative-free formulation. METHODS Primary HTMC were treated with different BAK concentrations over various exposure times. Cell viability was quantified using the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenol tetrazolium bromide assay, and apoptosis was measured by enzyme-linked immunosorbent assay. The cell viability of primary HTMC exposed to various concentrations and times of tafluprost free acid was also determined. Cells were treated with BAK and tafluprost free acid for 30 min at 37°C, and cell viability was again assessed. The effect of BAK on the gap junction protein Connexin-43 (Cx43) expression was subsequently examined. RESULTS BAK treatment resulted in a dose- and time-dependent decline in cell viability. Apoptosis increased following BAK treatment. Tafluprost-free acid treatment did not significantly affect cell viability. Tafluprost co-treatment with BAK resulted in an increase in cell viability as compared with BAK treatment alone. BAK treatment upregulated Cx43 expression in HTMC. CONCLUSIONS These results demonstrate that BAK is harmful to the health of cultured HTMC. Tafluprost is both safe and cytoprotective against BAK for these HTMC. The effect of tafluprost on the gap junctions of the HTM should be further investigated.
Collapse
Affiliation(s)
- Caitlin Chang
- Department of Ophthalmology, The University of Western Ontario, London, Ontario, Canada
| | | | | | | | | |
Collapse
|
6
|
Liu Y, Mao W. Tafluprost once daily for treatment of elevated intraocular pressure in patients with open-angle glaucoma. Clin Ophthalmol 2012; 7:7-14. [PMID: 23293509 PMCID: PMC3533683 DOI: 10.2147/opth.s30951] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
Glaucoma is a leading cause of visual loss worldwide. Current antiglaucoma therapy focuses on lowering intraocular pressure to a safe level. In recent years, prostaglandin analogs have become the first-line agents for treating open angle glaucoma. Tafluprost, which was first reported in 2003, is a novel prostaglandin analog, and has been shown to be a potent ocular hypotensive agent in a number of preclinical and clinical studies. Also, its unique preservative-free formulation helps to decrease preservative-associated ocular disorders and improve patient compliance. In this review, studies from 2003 to 2012 focusing on the structure, metabolism, efficacy, and safety of tafluprost are summarized. These studies suggested that application of tafluprost once daily is a safe and effective treatment for patients with open angle glaucoma.
Collapse
Affiliation(s)
- Yang Liu
- Department of Cell Biology and Anatomy, North Texas Eye Research Institute, University of North Texas Health Science Center, Fort Worth, TX
| | | |
Collapse
|
7
|
Fukano Y, Tsuyama N, Mizuno H, Date S, Takano M, Masujima T. Drug metabolite heterogeneity in cultured single cells profiled by pico-trapping direct mass spectrometry. Nanomedicine (Lond) 2012; 7:1365-74. [DOI: 10.2217/nnm.12.34] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
Aim: We investigated the heterogeneity of tafluprost metabolism in primary human hepatocytes at a single-cell level by live single-cell mass spectrometry (MS). Materials & methods: Picoliter volumes of cytoplasm were analyzed by nano-electrospray ionization MS in order to obtain single-cell metabolite profiles. The subcellular components of a single tafluprost-treated human hepatocyte were isolated and the single-cell metabolite profile was compared with those of traditional bulk hepatocyte analysis. Results: In the bulk hepatocyte analysis, liquid chromatography–MS showed the averaged metabolism of tafluprost to tafluprost acid (TA) and β-oxidized metabolites. However, live single-cell MS showed that tafluprost metabolism varied among individual cells. In addition, there was significant variation in the quantities of TA and a major metabolite, dinor-TA, among cells, whereas there was no significant variation in 7-ethoxycoumarin metabolism. Conclusion: Thus, live single-cell MS successfully detected the heterogeneity of drug metabolism in individual living hepatocytes. Original submitted 12 May 2011; Revised submitted 6 February 2012; Published online 14 May 2012
Collapse
Affiliation(s)
- Yasufumi Fukano
- Graduate School of Biomedical Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8551, Japan
- Ophthalmic Research & Development Center, Santen Pharmaceutical Co., Ltd, 8916–16 Takayama-cho, Ikoma, Nara 630-0101, Japan
| | - Naohiro Tsuyama
- Graduate School of Biomedical Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8551, Japan
| | - Hajime Mizuno
- Graduate School of Biomedical Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8551, Japan
| | - Sachiko Date
- Quantitative Biology Center, RIKEN, 6-2-3 Furuedai, Suita, Osaka 565-0871, Japan
| | - Mikihisa Takano
- Graduate School of Biomedical Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8551, Japan
| | - Tsutomu Masujima
- Graduate School of Biomedical Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8551, Japan
| |
Collapse
|
8
|
Ermiş SS. Differential pharmacology and clinical utility of preservative-free tafluprost in the treatment of ocular hypertension and glaucoma. Clin Ophthalmol 2012; 6:673-8. [PMID: 22654492 PMCID: PMC3363306 DOI: 10.2147/opth.s24248] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Glaucoma is a chronic disease requiring lifelong treatment. Discomfort due to medications may affect patients’ quality of life and may cause poor compliance, which leads to poor intraocular pressure control. To minimize the side effects of long-term treatment, preparations with lower benzalkonium chloride concentrations, preservative-free preparations and alternative preservatives have been developed and reported to have a lower rate of side effects. Tafluprost, launched on the ophthalmic market in 2008, is a new 16-phenoxy analogue of prostaglandin F2α, clinically used as an ocular hypotensive agent for the treatment of glaucoma and ocular hypertension. The safety and intraocular pressure-lowering efficacy of tafluprost has been demonstrated in various preclinical and clinical studies.
Collapse
Affiliation(s)
- Sıtkı Samet Ermiş
- Faculty of Medicine, Balıkesir University, Tıp Fakültesi, Čagış Kampüsü, Balıkesir, Turkey
| |
Collapse
|
9
|
Matsumura Y, Mori N, Morizawa Y, Kageyama M. Development of a Novel Anti-glaucoma Agent, Tafluprost: Synthetic Study of the Difluoroprostaglandin Derivatives. J SYN ORG CHEM JPN 2012. [DOI: 10.5059/yukigoseikyokaishi.70.798] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|